Booster Plug too rich? - Triumph Bobber Forum
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post #1 of 6 (permalink) Old 09-23-2018, 07:16 AM Thread Starter
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Booster Plug too rich?

I fitted a Booster Plug to my bike a few months ago, and a few happy thousand km with it; however I recently noticed a lot of black soot in the end of my exhausts, both sides. The bike runs fine with the BP, but I was concerned enough to take a look at the spark plugs and here is what I found...

Pics 1 & 2 are from the right cylinder
Pics 3 & 4 are from the left cylinder

Now, from my own experience in reading spark plugs, the electrodes and centre insulator look fine, but I'm concerned a little about the soot at the end of the threads.

What do you techies think?
And have any of you BP owners had excessive black soot in the rear of the exhaust?

I removed the BP, and cleaned out the rear exhaust end yesterday and went for a 20-30km ride. I immediately noticed the difference the BP made while fitted.
After the ride, just a little soot in the exhaust and slightly less on the plug than before.

I may ride to the dealer tomorrow and get him to check things out.

So whadda you guys think? Any help greatly appreciated.

Cheers!
mike

PS, while on a weekend tour in June with a friend, engine hot, he's riding behind me; I open the throttle wide to overtake a car, and he noticed a big black cloud come out of the exhausts, albeit briefly.
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Last edited by Mike the Bike; 09-23-2018 at 07:42 AM.
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post #2 of 6 (permalink) Old 09-23-2018, 10:15 AM
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Nothing wrong with those plugs. They look like they should.

Do you like the way the bike feels with the booster plug better than without? If so, use it. The soot is just a product of the bike running richer.....not too rich. Environmental and efficiency restrictions are the reasons bikes and cars are set up so lean from the factory.
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post #3 of 6 (permalink) Old 09-23-2018, 10:20 AM
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The color on the plugs are spot on.
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post #4 of 6 (permalink) Old 09-23-2018, 11:12 AM Thread Starter
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Thank you for your answers guys.

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post #5 of 6 (permalink) Old 09-23-2018, 03:14 PM
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My plugs were pulled last week for a routine check (plus an oil change) and the mechanic said they look perfect. Iíve also been running the Booster Plug for a few thousand + KMís.
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post #6 of 6 (permalink) Old 09-23-2018, 06:27 PM Thread Starter
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Quote:
Originally Posted by eisen77 View Post
My plugs were pulled last week for a routine check (plus an oil change) and the mechanic said they look perfect. Iíve also been running the Booster Plug for a few thousand + KMís.
Cheers mate

:-)

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